Filling device



R'l B. PARTRIDGE.

FILLING DEVICE.

APPLIcATloN HLED Auas. 1921.

Patented Aug. 22, 1922.

UNITE@ Sei-.willig iidriyllfmsllll EFFICE@ RALPH BERT PARTRIDGE, OF BIRMINGHAM, ENG-LAND, ASSIGNOR T0 SOUTEALI' 85 SMITH LIMITED, 0F BIRMINGHAM,

ENGLAND.

FILLING DEVICE.

Specification of Letters Patent.

Patented Auw. 22, i922.

Application led August 9, 1921. Serial No. 490,979.

To all 'w wm it man concern Be it known that I, RALPH BERT PAR- Tnmon, a subject of the Iing of Great Britain and Ireland, residing in the city or' Birming ham, England, have invented certain new and useful Improvements Relating to Filling Devices, of which the following is` a specilication.

This invention relates to machines for packing or measuring powdered materials, of the type in which a receptacle placed over the outer (and usually thev lower) end of a delivery nozzle is charged with material by means of a rotating` screw or worm situated within the nozzle. Ordinarily the outer end or" the nozzle is quite open, and it is found that the material is liable to clog at that end, resulting` in retardation of the speed of action of the machine, and inaccuracies in the amounts ci' the material delivered in successive operations..

The present invention has 'for its object to obviate the above mentioned detect in a simple and reliable manner, and 'for this purpose the invention comprises the use at the delivery end of the charging nozzle. of a grid, through which the material passes beiiore entering the receptacle placed over the nozzle.

In the accompanying sheet oit explanatory drawing:

Figure l is a part sectional side elevation and Figure 2 a sectional plan showing dia grammatically one mode of carryingthe invention into effect.

The grid a aforesaid is constructed in the .form of a number of narrow strips radiating from a common centre. This `grid is placed within the outer end of the nozzle the ends of the strips terminating at the innercylindrical surface ot the nozzle. The strips may each be sharpened to a lmi'le edge as shown at the upper side ci the grid. Though a grid of this form is preferred, the invention is not limited thereto.

Interiorly the nozzle is provided with the usual worm c by which the material fed into the upper side of the nozzle is forced out at its lower end. Over the lower end ofthe nozzle is placed a receptacle as CZ to be charged, this receptacle being supported on a carrier e to which upward pressure is applied during the charging operation in any usual manner. While the material is being` fed into the receptacle, the pressure exerted on the material by the worm forces the receptacle and its support downwards against the upward force applied to the support until the charging operation is completed, when the receptacle is withdrawn and replaced by another.

By'means oi' a grid as above described, clogging of the nozzle is avoided, a free and uniform passage of material is ensured, and the amount of material delivered at each operation of the machine can be more accurately determined' than when a plain open nozzle is used. The tendency found with the ordinary nozzle for the material to be eX- truded between the outer side of the nozzle and the open end oli'- the receptacle which fits over the nozzle is eliminated, and further the grid serves to minimize the falling away from the nozzle of loose material after the motion of the worm has been stopped.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is: l

l. In machines of the type specified for packing or measuring powdered material into receptacles, the combination with a delivery nozzle, of a grid through which the material passes before leaving the nozzle, substantially as described.

2. In machines of the type specified for packing or measuring powdered material into receptacles, the combination with the outer end of a delivery nozzle, of a plurality orl narrow strips radiating from a common centre and forming` a grid through which the material passes before leaving the nozzle, substantially as described. l

In testimony whereof I have signed my name to this specification.

RALPH BERT PARTRIDGE. 

